Cyclohexylamine → HCID 10000342, compound

HRID 1376764Notes

Reaction equation

HRID 1376764 reaction equation
[CH3:1][O:2][C:3]([C:5]1[CH2:10][C:9](O[Si](C)(C)C)=[C:8](O[Si](C)(C)C)[CH2:7][C:6]=1[C:21]([O:23][CH3:24])=[O:22])=[O:4].[CH:25]1([NH2:31])[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]1>C(O)(=O)C>[CH3:1][O:2][C:3](=[O:4])[C:5]1[C:6](=[CH:7][C:8]([NH:31][CH:25]2[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]2)=[C:9]([NH:31][CH:25]2[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]2)[CH:10]=1)[C:21]([O:23][CH3:24])=[O:22]

Participants

4

Reactant 2

HCID 7965CyclohexylamineHCID 10022190HCID 10022190, compound

Product 1

HCID 10000342HCID 10000342, compound

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

A solution of 2.4 g (6 mmol) of 4,5-bis(trimethylsilyloxy)cyclohexa- 1,4-diene- 1,2-dicarboxylic acid dimethyl ester (Example 1a) in 21.5 ml (188 mmol) of cyclohexylamine and 4.5 ml of glacial acetic acid is boiled under reflux for 3.5 hours. The reaction mixture is cooled, the solvent is evaporated off and the dark-brown residue is dissolved in dichloromethane and the solution is washed in succession with 100 ml of 2N HCl, 50 ml of saturated NaHCO3 and twice with 20 ml of water, dried with sodium sulfate and concentrated by evaporation. The evaporation residue is chromatographed on silica gel with ethyl acetate/hexane 5:12 and the product fractions are concentrated by evaporation and again chromatographed with ethyl acetate/hexane 1:4, yielding the title compound in the form of a yellow oil, FAB-MS: 388 [M+ ].

Workup

  1. temperatureunder reflux for 3.5 hours
  2. temperatureThe reaction mixture is cooled
  3. customthe solvent is evaporated off
  4. dissolutionthe dark-brown residue is dissolved in dichloromethane
  5. washthe solution is washed in succession with 100 ml of 2N HCl, 50 ml of saturated NaHCO3 and twice with 20 ml of water
  6. dry with materialdried with sodium sulfate
  7. concentrationconcentrated by evaporation
  8. customThe evaporation residue is chromatographed on silica gel with ethyl acetate/hexane 5:12
  9. concentrationthe product fractions are concentrated by evaporation
  10. customagain chromatographed with ethyl acetate/hexane 1:4

Sources & evidence

ORD record
ord-da9f7153da9148789a2ce18b9d3f00c7
Source dataset
uspto-grants-1997_09
Patent number
US05663336

Reaction notes

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